Signal output circuit, electronic device and moving object

Abstract

A signal output circuit includes a signal correction circuit, having a clock signal input thereto, which corrects the clock signal to output the corrected signal, and a waveform shaping circuit that shapes a signal from the signal correction circuit. In the clock signal, pulses having a pulse width τ capable of being represented by a length of a time are periodically arranged with a period T, and the pulse width τ and the period T satisfy a relation of τ/T≠0.5. The signal correction circuit attenuates a signal having a second frequency based on a time width of at least one of the pulse width τ and a pulse width T−τ, rather than a signal having a first frequency based on the period T.

What is claimed is: 
     
       1. A signal output circuit comprising:
 a signal correction circuit, having a clock signal input thereto, which corrects the clock signal to output the corrected signal; and 
 a waveform shaping circuit that shapes a signal from the signal correction circuit, 
 wherein in the clock signal, pulses having a pulse width τ capable of being represented by a length of a time are periodically arranged with a period T, and the pulse width τ and the period T satisfy a relation of τ/T≠0.5, and 
 the signal correction circuit attenuates a signal having a second frequency based on a time width of at least one of the pulse width τ and a pulse width T−τ, rather than a signal having a first frequency based on the period T. 
 
     
     
       2. The signal output circuit according to  claim 1 , wherein the signal correction circuit includes a filter circuit that passes the signal having a first frequency and attenuates the signal having a second frequency. 
     
     
       3. The signal output circuit according to  claim 1 , wherein the signal correction circuit includes a series circuit, connected between a signal line through which the clock signal is transmitted and a reference potential, which has an inductor and a first capacitance circuit connected in series to each other. 
     
     
       4. The signal output circuit according to  claim 3 , wherein the first capacitance circuit includes a variable capacitive element. 
     
     
       5. The signal output circuit according to  claim 3 , further comprising a first correction signal generation circuit that generates a first control signal based on at least one of the pulse width τ and the period T,
 wherein a capacitance value of the first capacitance circuit is controlled on the basis of the first control signal. 
 
     
     
       6. The signal output circuit according to  claim 3 , wherein the signal correction circuit further includes a second capacitance circuit which is connected in parallel to the series circuit. 
     
     
       7. The signal output circuit according to  claim 5 , wherein the signal correction circuit further includes a second capacitance circuit which is connected in parallel to the series circuit. 
     
     
       8. The signal output circuit according to  claim 6 , wherein the second capacitance circuit includes a variable capacitive element. 
     
     
       9. The signal output circuit according to  claim 7 , wherein the second capacitance circuit includes a variable capacitive element. 
     
     
       10. The signal output circuit according to  claim 6 , further comprising a second correction signal generation circuit that generates a second control signal based on the period T,
 wherein a capacitance value of the second capacitance circuit is controlled on the basis of the second control signal. 
 
     
     
       11. The signal output circuit according to  claim 7 , further comprising a second correction signal generation circuit that generates a second control signal based on the period T,
 wherein a capacitance value of the second capacitance circuit is controlled on the basis of the second control signal. 
 
     
     
       12. An electronic device comprising the signal output circuit according to  claim 1 . 
     
     
       13. A moving object comprising the signal output circuit according to  claim 1 .